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#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    //ui->lineEdit->text() = ui->lineEdit->text().replace(".",",").toFloat();
    float a = ui->lineEdit->text().replace(".",",").toFloat();
    float b = ui->lineEdit_2->text().replace(".",",").toFloat();
    float c = ui->lineEdit_3->text().replace(".",",").toFloat();

    float FORMULA = a/100*b*c;
    ui->lineEdit_4->setText(QString::number(FORMULA));
}